Source:

Response:

It is hard to understand how anyone could make this claim, since
anything mutations can do, mutations can undo. Some mutations add
information to a genome; some subtract it. Creationists get by
with this claim only by leaving the term "information" undefined,
impossibly vague, or constantly shifting. By any reasonable
definition, increases in information have been observed to evolve. We
have observed the evolution of

If these do not qualify as information, then nothing about information
is relevant to evolution in the first place.

A mechanism that is likely to be particularly common for adding
information is gene duplication, in which a long stretch of DNA is
copied, followed by point mutations that change one or both of the
copies. Genetic sequencing has revealed several instances in which
this is likely the origin of some proteins. For example:

Two enzymes in the histidine biosynthesis pathway that are
barrel-shaped, structural and sequence evidence suggests, were
formed via gene duplication and fusion of two half-barrel ancestors
(Lang et al. 2000).

RNASE1, a gene for a pancreatic enzyme, was duplicated, and in
langur monkeys one of the copies mutated into RNASE1B, which works
better in the more acidic small intestine of the langur. (Zhang et
al. 2002)

Yeast was put in a medium with very little sugar. After 450
generations, hexose transport genes had duplicated several times,
and some of the duplicated versions had mutated further. (Brown et
al. 1998)

According to Shannon-Weaver information theory, random noise
maximizes information. This is not just playing word games. The
random variation that mutations add to
populations is
the variation on which selection acts. Mutation alone will not cause
adaptive evolution, but by eliminating nonadaptive variation, natural
selection communicates information about the environment to the
organism so that the organism becomes better adapted to it. Natural
selection is the process by which information about the environment is
transferred to an organism's genome and thus to the organism (Adami et
al. 2000).

The process of mutation and selection is observed to increase
information and complexity in simulations (Adami et al. 2000;
Schneider 2000).